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sdas [7]
3 years ago
7

Why do we Sample instead of looking at the entire population if we understand that a Sample is not the true representative of th

e population? a. Sample results are adequate and therefore enough to make a population inference. b. It is physically impossible to check the entire population most of the time. c. Studying the whole population may be too time consuming d. The Cost of studying the entire population may be prohibited e. All of the reasons are correct.
Mathematics
1 answer:
BaLLatris [955]3 years ago
7 0

Answer:

e. All of the reasons are correct.

Step-by-step explanation:

In most cases, studying all the population is impossible. In other cases, it is too expensive or time consuming.

A sample will give us, in most cases and combined with tools of statistical analysis (hypothesis testing or confidence intervals), enough information to make an unbiased estimation about the characteristic of the population we are studying.

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Y = 4x + 3<br> y = 2x − 4 <br> what is the system of equations?
borishaifa [10]

Answer: X=-7/2

               y=-11

Step-by-step explanation:

4x+3=2x-4

4x-2x=-4-3

2x=-7

x=-7/2

y=-7/2*2-4

y=-7-4=-11

4 0
3 years ago
Let n (AUB)=32n(B)=16and n(ANB)9 find n (A)​
Lubov Fominskaja [6]

Answer:

32

Step-by-step explanation:

n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)

Given n(A)= ? we represent with x

n(B)= 16

n(A∪B) = 32

Substituting in equation 1 to get n(A)

32  = n(A) + 9 − 9

⇒n(A) = 32 − 0

n(A)  = 32

to confirm this we put the values into the formula below

n(A∪B)=n(A)+n(B)−n(A∩B)−−−−−−−(1)

32 =  32 + 9 - 9

4 0
2 years ago
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Jim paddles from one shore of a lake 3 miles wide at 4 mph, and John paddles from the opposite shore at 5 mph. How long will the
Tomtit [17]
I believe its answer C
6 0
3 years ago
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Complete the solution of the equation find the value of y when x equals 2. -8x - 5y = -1
tatuchka [14]

Answer: y = -3

<u>Step-by-step explanation:</u>

-8x - 5y = -1

<u>+8x        </u>  <u>+8x </u>

       -5y = 8x  - 1

       <u> ÷-5 </u> <u> ÷-5</u>  <u>÷-5</u>

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       y(2) = -\frac{8}{5}(2) + \frac{1}{5}

               = -\frac{16}{5} + \frac{1}{5}

               = -\frac{15}{5}

                = -3

6 0
3 years ago
Suppose 86% of 50 people at a law firm like their job. How many people like their job.
solniwko [45]
To find 86% of 50, you do 50*.86 (because .86 is the decimal form of the percentage 86%)

50*.86=43 people

Hope this helps
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3 years ago
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